How do you fix code 55(knock signal circuit RH bank)

ROD J

MEMBER

2 POSTS

1993 LEXUS ES 300

128,000 MILES

I change the knock sensors, throttle body, throttle position sensor, and the ecm. I had the negative battery cable disconnected and I pulled the efi fuse when I did all the work. The check engine light still comes on and goes off with the code 55 appearing.

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Tuesday, September 27th, 2011 AT 8:03 PM

3 Replies

ASEMASTER6371

EXPERT

26,358 POSTS

Wow, you replaced a lot of parts. In most cases I have seen, the connectors on the sensors are what fails. The end kit is about 30.
You really should have spent the money for a real diag from a shop. It would have prevented needless parts replacement.